The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 05, 1983
Filed:
Dec. 10, 1980
Milton L Noble, Liverpool, NY (US);
Bryan L Cleaveland, Baldwinsville, NY (US);
General Electric Company, Syracuse, NY (US);
Abstract
The invention relates to an electron discharge device in which radio frequency energy is generated or amplified by high speed electrons traveling in a beam along the axis of a waveguide and subjected to a periodic magnetic field. The periodic field causes the electrons to travel in periodic orbits producing electromagnetic energy. When suitably adjusted, the energy in the beam is converted into electromagnetic energy of a given frequency. The device herein disclosed has an improved magnetic structure for causing the beam to travel in a helical path and for focusing it as it pursues this path. The helical path is produced by a static, spatially circularly polarized transverse field. Focusing of the beam is achieved by a pair of similar helically disposed axial magnetic fields having mutually opposite polarization. The fields are created by a plurality of short permanent magnets with cooperating pole pieces for directing the magnetic fields into the waveguide, and disposed in four rows arranged about the perimeter of the waveguide.